In the National Comprehensive Cancer Network (NCCN) guideline for NSCLC, epidermal growth factor receptor-tyrosine kinase inhibitor (EGFR-TKI) is recommended as the third-line treatment for EGFR gene mutation negative NSCLC patients who failed to the first-line platinum doublet chemotherapy [i.e. paclitaxel-carboplatin (PC) or gemcitabine-cisplatin (GP)] and the second-line chemotherapy with docetaxel or pemetrexed. But as we know, if patients had no EGFR gene mutation, EGFR-TKI treatment is not effective. The overall survival is short and the objective response rate is low. As for EGFR gene wild type patients with good performance status, besides EGFR-TKI treatment, other first generation cytotoxic drugs i.e. vinorelbine or ifosfamide maybe an alternative treatment. So the purpose of this clinical trial is to compare the effectiveness and safety of vinorelbine-ifosfamide with gefitinib in advanced or metastatic EGFR gene mutation negative NSCLC patients.